Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 5 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/24/2018   22:11:29   (  -0.07,-135.20) (   0.78,-131.40)  432.83                80
 05/26/2018   10:30:38   (   0.05,-135.13) (   0.38,-136.68)  175.70                80
 05/27/2018   10:14:32   (   0.05,-135.10) (  -0.59,-132.13)  337.78                80
 05/28/2018   22:33:48   (  -0.03,-135.08) (  -0.59,-137.44)  269.18                80
 05/29/2018   22:17:44   (  -0.04,-135.05) (   0.43,-132.91)  244.07                80
 05/31/2018   10:36:52   (   0.02,-134.97) (   0.72,-138.18)  365.34                80
 06/01/2018   10:20:47   (   0.03,-134.94) (  -0.25,-133.64)  147.46                80
 06/02/2018   22:40:03   (  -0.01,-134.90) (  -0.93,-138.94)  460.78                80
 06/03/2018   22:23:59   (  -0.02,-134.87) (   0.10,-134.41)   51.90                80
 06/06/2018   10:24:21   (   0.01,-134.74) (   0.09,-135.15)   45.94                80
 06/07/2018   10:08:16   (   0.03,-134.70) (  -0.88,-130.60)  466.21                80